| http://www.w3.org/ns/prov#value | - However, deaths have been reported in people who have taken only small doses.In the US there have been concerns about a link between the use of methamphetamine by gay men and unprotected sex, particularly when used in conjunction with drugs to treat erectile dysfunction, such as Viagra and Cialis.There has been a case report of an interaction between methamphetamine and the protease inhibitor rito
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